Supercritical Fluid Extraction as a Method of Thermochemical Activation of Wood Cell Walls

Selective extraction of terpenoid compounds of Juniperus communis L. wood in the medium of a binary solvent (supercritical CO2 with modifier)

“…The optimal parameters of supercritical extraction of wood were selected both on the basis of literary data and our previous work. The optimal pressure and temperature of supercritical extraction of wood were proved in Bogolitsyn et al and Ivahnov et al It is shown that the pressure of supercritical treatment in the range of 200 to 300 bar increases the yield of compounds.…”

“…The thermochemical activation of the juniper wood matrix in this case involves treatment by steam explosion and the SCE methods. Leading to the destruction of the thermodynamic equilibrium of the system and the activation of the lignin–carbohydrate complex in wood …”

“…Leading to the destruction of the thermodynamic equilibrium of the system and the activation of the lignin-carbohydrate complex in wood. 17,18 The essence of the steam explosion is a short-term treatment of the plant raw material by hot (180-260°C) steam under pressure (1.2-3.4 MPa) with a subsequent pressure drop to atmospheric pressure. 17,19 The impact of the steam explosion on the lignincarbohydrate matrix consists of two components: mechanical and chemical.…”